1. Adinolfi, M., Glynn, A. A., Lindsay, M., and Milne, C. M. (1966). Immunology, 10, 517.
2. Appleton, M. D., and Pritham, G. H. (1963). Amer. J. ment. Defic.. 67, 521.
3. The Child with Mongolism. Grune and;Benda, C.E.,1960
4. Blumberg, B. S. (1966). J. clin. Invest., 45, 988.
5. Coghlan, M. K., and Evans, P. R. (1964). Guy's Hosp. Rep., 113, 223.